Prandtl

Prandtl, in fluid dynamics, refers to Ludwig Prandtl, a pioneering scientist who developed the boundary layer theory. This theory explains how, when a fluid flows over a surface, a thin region forms near the surface where the fluid's velocity changes from zero (due to sticking to the surface) to the free stream velocity. Understanding this boundary layer helps engineers predict drag, heat transfer, and flow behavior around objects like planes, ships, and cars. Prandtl’s work is fundamental for designing more efficient and aerodynamic structures.